JP4009665B2 - Stirrer blade for concrete mixer - Google Patents

Description

表１は、左右の内送りアーム３の位置を、回転軸１に対して夫々 180度移転した位置から更に45度移転した位置の攪拌アーム２を使用した本発明攪拌羽根の練り性能を示す表である（30秒練り）。
【００１４】
【表２】

表２は、左右の内送りアーム３の位置を、回転軸１に対して夫々 180度移転した位置の攪拌アーム２を使用した攪拌羽根の練り性能を示す表である（50秒練り）。
【００１５】
これら二つの攪拌羽根の練り性能を比較すると、本発明攪拌羽根による、コンクリート中の単位容積重量差は、0.38％であり、JIS 規格範囲の5.0 ％を約13倍以上の練り効果が認められる。この数値は、従来のコンクリートミキサーで、3.0 〜4.0 ％が平均であり、当出願人が先に開発した表２のタイプでも1.34％といった数値が限界であったことから、本発明攪拌羽根による0.38％といった混練数値が、いかに高い水準にあることがわかる。しかも、表２では、50秒もの時間を要しているのに対し、表１では、このような練り性能を、わずか30秒で提供できる。このように、練り性能を格段に高めるだけでなく、従来よりも短時間で混練することが可能になった。
【００１６】
尚、表１で使用した外送りアーム４は、連結軸１の先端側に設けた外パドル４Ｂａと、基端部側に設けた内パドル４Ｂｂとからなり、内パドル４Ｂｂは、横長の板体状を成すと共に、連結軸４Ａの先端方向に突出する扇形に湾曲形成したものを使用した。
【００１７】
【発明の効果】
本発明によると、これまで実現できなかった精度の高いコンクリートを従来よりも短時間で混練することが可能になった。
【００１８】
すなわち、請求項１により、コンクリートの流れは、中央部分から両端部分へ移動し、また、両端部分から中央部分へ移動するので、均一な混練が行われ、混練時間を短縮することができた。
【００１９】
特に、横並びになるパドルが一つもなくなり、コンクリートの流れを妨げずに極めてスムーズな混練ができるようになった。この結果、コンクリート中の単位容積重量差が0.38％といった精度の高いコンクリートを、わずか30秒で提供できるものになっている。
【００２０】
更に、請求項２により、混練容器Ｐ内での外送りアーム４の回転を滑らかにすることができ、回転軸１の中央部分に集まったコンクリートを回転軸１の両端部方向に向けてスムーズに送り込むことができる。
【００２１】
この結果、コンクリート建築技術の飛躍的な進歩により切望されていた混練精度の高いコンクリートを短時間で混練できる攪拌羽根を提供することができる。
【図面の簡単な説明】
【図１】 本発明の一実施例を示した攪拌羽根の正面図である。
【図２】 本発明の一実施例を示した攪拌羽根の回転状態を示す正面図である。
【図３】 本発明の図２（イ）に示す一部を省略した矢視III-III 線側面図である。
【図４】 本発明の図２（イ）に示す矢視IV-IV 線側面図である。
【図５】 各攪拌アームを連結軸から四方に配設した攪拌羽根の正面図である。
【符号の説明】
Ｐ 混練容器
１ 回転軸
２ 攪拌アーム
３ 内送りアーム
３Ａ 連結軸
３Ｂ 係止部
４ 外送りアーム
４Ａ 連結軸
４Ｂ 補強圧着片
４Ｂａ 外パドル
４Ｂｂ 内パドル
１０ 回転軸
２０ 攪拌アーム
２１ パドル
２１Ａ 外パドル
２１Ｂ 内パドル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stirring blade for a concrete mixer for kneading concrete, particularly for a concrete mixer for kneading high-quality concrete in which a concrete material such as gravel, sand, cement, and water are uniformly dispersed in a short time. This relates to a stirring blade.
[0002]
[Prior art]
Conventionally, many apparatuses are provided as an apparatus for kneading concrete. For example, Japanese Patent Laid-Open No. 54-147565 describes a concrete kneading and conveying apparatus that uses a scraping and mixing blade, a shearing blade, and a chain to obtain high-quality concrete. In this apparatus, a chain is connected to the tip of an adjacent shearing blade, and kneading of concrete is attempted to be performed quickly and uniformly by the action of this chain.
[0003]
[Problems to be solved by the invention]
However, in the apparatus in which the chain is connected to the tip of the shearing blade as described above, the position of the chain is easily changed by the resistance at the time of stirring even if the stirring of the mortar or the like can be performed effectively, so that the gravel etc. When the aggregate having a large amount of resistance hits the chain, the position of the chain changes, and it is difficult to uniformly stir the aggregate in the mortar.
[0004]
Therefore, the present applicant has developed a stirring blade as shown in FIG. 5 so that even the aggregate in the mortar can be uniformly kneaded. The stirring blades are obtained by implanting stirring arms 20 from the horizontal rotary shaft 10 toward the surrounding four sides, and each stirring arm 20 is a stirring blade arranged radially with respect to the rotary shaft 10 in four directions. With this equipment, even the aggregates in the mortar can be uniformly kneaded (unit volume weight difference in concrete = 1.34% <5% (JIS standard)).
[0005]
However, due to dramatic progress in concrete construction technology, demand for concrete with higher kneading accuracy has increased, and it has been desired to provide a stirring blade capable of kneading in a shorter time. However, in the stirring blade shown in FIG. 5, even if it is intended to further improve the kneading accuracy, the concrete is entangled with the paddles 21 of the side-by-side stirring arms 20 and the concrete load is simultaneously applied. Diffusion would worsen. In addition, the stirring blades shown in FIG. 5 are those in which the respective concrete feed directions are reversed between the outer paddle 21 </ b> A and the inner paddle 21 </ b> B of each stirring arm 20. For this reason, it was found that the concrete flows interfered with each other and the stirring effect was hindered by some paddles 21 arranged side by side.
[0006]
Therefore, the present invention was created in view of the above-mentioned circumstances, and is a concrete mixer stirring blade capable of kneading high-precision concrete that could not be realized so far in a shorter time than before. For the purpose of provision.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the first means of the present invention is a stirring blade in which a plurality of stirring arms 2 perpendicular to the horizontal rotating shaft 1 are radially installed, and the stirring arm 2 has a rotating shaft. A pair of left and right inner feed arms 3 arranged at both ends of 1 and a center of the rotary shaft 1 from each inner feed arm 3 are sequentially arranged with a gap at each side, and each inner feed arm 3 is a starting point. It consists of three pairs of left and right external feed arms 4 arranged at positions sequentially shifted by 90 degrees in the rotation direction of the rotary shaft 1 and feeds the concrete material in the central direction of the rotary shaft 1 by the internal feed arm 3 and external feed. The arm 4 feeds the rotating shaft 1 toward both ends and stirs it.
[0008]
Further, the pair of left and right inner feed arms 3 are arranged at positions further shifted 45 degrees from the positions moved 180 degrees with respect to the rotary shaft 1, and the left and right outer feed arms 4 are started from these inner feed arms 3. Each is arranged.
[0009]
The outer feed arm 4 of the second means includes an outer paddle 4Ba provided on the distal end side of the connecting shaft 4A and an inner paddle 4Bb provided on the base end side. The inner paddle 4Bb is a horizontally long plate body. It is a means for solving the problem that the fan is curved and formed into a fan shape protruding in the direction of the tip of the connecting shaft 4A.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 shown in FIG. 1 is a rotating shaft 1 disposed horizontally in the kneading vessel P and is rotated by a predetermined driving device (not shown). And the several stirring arm 2 orthogonal to this rotating shaft 1 is planted radially.
[0011]
The agitation arm 2 consists of two types, an inner feed arm 3 and an outer feed arm 4. The inner feed arm 3 has a pair of left and right ends of the rotary shaft 1. On the other hand, the outer feed arm 4 is one in which the center of the rotary shaft 1 is sequentially arranged from the left and right inner feed arms 3 with a gap between them, and three pairs in total on the left and right are provided. The outer feed arm 4 is provided at a position where the left and right inner feed arms 3 are sequentially moved 90 degrees in the rotational direction of the rotary shaft 1. Therefore, the relationship between the left and right inner feed arms 3 and the outer feed arms 4 is set such that each inner feed arm 3 and each of the three left and right outer feed arms 4 radiate in the left and right directions, respectively.
[0012]
Therefore, the positions of the left and right inner feed arms 3 are arranged at positions where the positions of the left and right inner feed arms 3 have been further shifted by 45 degrees from the positions that have been moved 180 degrees with respect to the rotary shaft 1 in advance, and the left and right outer feed arms 4 are respectively arranged from this position. (See FIGS. 3 and 4). As a result, the left and right stirring arms 2 radiating in all directions are provided at positions where the planting position on the rotary shaft 1 is different by 225 degrees or 135 degrees depending on the left and right.
[0013]
[Table 1]

Table 1 shows the kneading performance of the stirring blade of the present invention using the stirring arm 2 at a position where the position of the left and right inner feed arms 3 is further shifted 45 degrees from the position where they are moved 180 degrees with respect to the rotary shaft 1. (Kneaded for 30 seconds).
[0014]
[Table 2]

Table 2 is a table showing the kneading performance of the stirring blades using the stirring arms 2 at positions where the positions of the left and right inner feed arms 3 are moved 180 degrees with respect to the rotary shaft 1 (50 seconds kneading).
[0015]
Comparing the kneading performance of these two stirring blades, the unit volume weight difference in the concrete by the stirring blade of the present invention is 0.38%, and the kneading effect of about 13 times or more of 5.0% of the JIS standard range is recognized. This value is an average of 3.0 to 4.0% in the conventional concrete mixer, and the value of 1.34% is the limit even in the type of Table 2 previously developed by the present applicant. It can be seen that the kneading value such as% is at a high level. Moreover, while Table 2 requires 50 seconds, Table 1 can provide such kneading performance in as little as 30 seconds. Thus, not only the kneading performance is remarkably improved, but also kneading can be performed in a shorter time than before.
[0016]
The outer feed arm 4 used in Table 1 includes an outer paddle 4Ba provided on the distal end side of the connecting shaft 1 and an inner paddle 4Bb provided on the proximal end side. The inner paddle 4Bb is a horizontally long plate body. In addition, a fan having a curved shape in a fan shape protruding in the direction of the tip of the connecting shaft 4A was used.
[0017]
【The invention's effect】
According to the present invention, it has become possible to knead highly accurate concrete that has not been realized so far in a shorter time than before.
[0018]
That is, according to the first aspect, the flow of the concrete moves from the central portion to both end portions, and also moves from both end portions to the central portion, so that uniform kneading is performed and the kneading time can be shortened.
[0019]
In particular, there is no side paddle, and extremely smooth kneading can be performed without hindering the flow of concrete. As a result, it is possible to provide highly accurate concrete with a unit volume weight difference in the concrete of 0.38% in just 30 seconds.
[0020]
Further, according to the second aspect , the rotation of the outer feed arm 4 in the kneading vessel P can be made smooth, and the concrete collected at the central portion of the rotary shaft 1 can be smoothly directed toward both ends of the rotary shaft 1. Can be sent.
[0021]
As a result, it is possible to provide an agitating blade that can knead concrete with high kneading accuracy, which has been eagerly awaited by dramatic progress in concrete building technology, in a short time.
[Brief description of the drawings]
FIG. 1 is a front view of a stirring blade showing an embodiment of the present invention.
FIG. 2 is a front view showing a rotating state of a stirring blade according to an embodiment of the present invention.
FIG. 3 is a side view taken along the line III-III of FIG.
FIG. 4 is a side view taken along the line IV-IV shown in FIG. 2 (a) of the present invention.
FIG. 5 is a front view of a stirring blade in which each stirring arm is arranged in four directions from a connecting shaft.
[Explanation of symbols]
P Kneading container 1 Rotating shaft 2 Stirring arm 3 Inner feeding arm 3A Connecting shaft 3B Locking portion 4 Outer feeding arm 4A Connecting shaft 4B Reinforced crimping piece 4Ba Outer paddle 4Bb Inner paddle 10 Rotating shaft 20 Stirring arm 21 Paddle 21A Outer paddle 21B Inside paddle

Claims (2)

A stirring blade in which a plurality of stirring arms orthogonal to a horizontal rotation axis are radially installed, and the stirring arm includes a pair of left and right inner feed arms with both ends of the rotation shaft arranged on the side, and each inner feed arm The center of the rotating shaft is sequentially arranged with a crease between each other, and three pairs of left and right outer feeding arms arranged at positions sequentially shifted 90 degrees in the rotation direction of the rotating shaft starting from each inner feeding arm In the mixing blade for a concrete mixer that feeds and stirs the concrete material in the center direction of the rotating shaft by the inner feeding arm and feeds it to both ends of the rotating shaft by the outer feeding arm, the pair of left and right inner feeding arms rotate disposed in a position moved further 45 degrees from a position moved respectively 180 degrees with respect to the axis, characterized in that each outer feeding arm these inner feed arm starting and respectively sequentially arranged concrete Kisa for stirring blade.   The outer feed arm includes an outer paddle provided on the distal end side of the connecting shaft and an inner paddle provided on the proximal end side. The inner paddle has a horizontally long plate shape and extends in the distal direction of the connecting shaft. The stirring blade for a concrete mixer according to claim 1, wherein the stirring blade is bent into a protruding sector shape.

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